2D CAD Data Mining Based on Spatial Relation. - Hiroaki Kizu; Junko Yamamoto; Takeshi Takeda; Keiji Gyohten; Naomichi Sueda (ICDAR, 2009)

Graph Compression by Tree Grammars and Direct Evaluation of Regular Path Query. - Takeshi Takeda; Kenji Hashimoto; Hiroyuki Seki (ICCCS, 2019)